Improvement in machines for scraping iron



CHRISTOPHER ZUG, OF PITTSBURG, PENNSYLVANIA.

LettersY Patent No. 113,611, dated Aprilfll, 1871.

.IMPROVEMENT IN MACHINES FOR SCRAPING IRON.

The Schedulel referred to in these Letters Patent and making parl: of the same.

To all whom fit may conce/rn:

Be it known that I, CHRISTOPHER ZUG,.of Pittsburg, in the county of Allegheny and State of Pennsylvania, have inventedv a new andnseful Improvement in VMachine for Scaling Rolled Metals; and I do hereby declare the following to' be a full, clear, and ex- 'act description thereof', reference being had to the ac# companying drawing making apart of this specication, in which- Y Figure lis a front elevation of my improved mai chine for scaling plate or bar-iron;

Figure 2 is a sectional view of the saine through :t ,fig. l; and

Figure 3 is an end view of the same showing a tripping device. p

.Like letters of reference indicate like parts in each.

In the processV of scraping the scale from plates, sheets, slabs, or bars of rolled metal, heretofore in use, the scrapers are operated by hand.

My invention, being an automatic device foroperating the scraper, allows me to dispense with the inan- 'ual labor, thus cheapeus the manufactureof such forms of metal, and -produces a better surface inthe article manufactured.

.'Io enable others skilled in th-eart to makeand use my invention, I will proceed to describe its construction and modeof operation.

roll b, but allow it .to'move up and down in the hous-v ing a, as may benecessary.

The lower Aroll b is mounted in the' usual way,

The limit of upward movement ofthe roll b is regulated at pleasure by means of the pressure-screws d d, which operate against the blocks c c, in the usual way. v

In lfront of =the rolls is a pair of scrapers, c f. The lower scraper, c, is a double one,bei'ng two Scrapers or blades set in a frame, e.

- The frame e" is fastened to the housing a and lies parallel with the roll b.

The Ytwo blades of the double scraper e areiset far enough apart to allow the scraper f, which moves up and down in a pair of ways, It 71', to pass down or exertjits downward pressure in a plane passing between them.

Passing up' from the movable scraper j; to .which it is rigidly attached', is a piston-rod, fi.

This piston-rod i passes up through a steamcy1inder, k, of theusualconstruction, in which operates' a piston-head, also ofthe usual construction.

At the side of the cylinder k is a steam-chest, l, in which there is au ordinary steain-valve.

Steam is admitted into the chest through pipes m, shown in fig. l. i

The valve in the steam-chest is operated by means of a valve-stem, u, whichY is connected, by the lever o and rod 1;,with a tripping-lever, q, pivoted at one end, q', to the housing, and oonnected,between its ends,

' with a bearing, o, on the end of the upper `roll b.

Passing out of the cylinder k, and leading down to a point just over lthe path of the sheet whereit passes into the rollsgis a small steam-pipas.

The operation of my machine is as follows:

A sheet, bar, slab, or plate of iron or steel, or other metal to be rolled, is passed to the rolls, over the lower scrapers e, the scraper f -beng raised whenever4 the rolls are not in actual operation, and until the iron enters the bite. As the roll b rests upon the roll b, the sheet, passing .bet\veenthem'," raises or pushes the movable roll b up in the housing a. This raises I"the lever q, and, through the level' o and rodp, presses down the valve-stern n and the valve in 4the steamlchest l. Thisopcns the ports and admits steam into the cylinder k above thepiston therein, where -it forces the piston do'wn, and, as the scraper f is firmly fastened to the end of the pistou-rod i, it is'pressed down firmly upon the upper surface o't" the sheet, bar, or plate.

The downward stroke may be limited by stops, if sodesired. l I

The rolls, having taken a bite upon the iron, sheet, orplate before the scraper f comes down upon it, draw it through'between the Scrapers, which remove the scale from the plate as it passes between them;

The position of the Scrapers e and j' may be reversed the double scraper e may be the upper or movable one, and the scraper f the lower or fixed one, if desired; or both Scrapers may 'be double 'or singlebladed or the upper scraper may be stationary and the lower one movable, in which latter case a stroke should be given to the piston the reverse of that described; or a reverse motion communicated in other known ways.

` `The pipes is for the pill-pose of blopjip;ghtlre,scalpM ...an means of a steam raper's by flc l ms.

passing through the rolls and so injuring the polish or lnish of the sheet.

l After the sheet has passed through the rolls the upper roll drops down upon the lower roll, depresses the lever q, and, through the levers 1i and o, raises the valvc-stem n and with it the valve.v This opens the lower ports, admits the steam into the cylinder k under the piston, whichl raises the piston and with it the vscraper f, when the machine is ready for another turn i also, the piston,'at its*J upward stroke, covers and closes the port leading to the pipe s.

It will be observed that, in the mechanical operation described, the upper roll, arranged in the path of the plate, sheet, slab, or bar, performs the function' ot atripper, and, through an arrangement of levers, gives the desired throw to the steam-valve in the valvechest. Instead of this the rolls, as in the rolling of bar-iron orslabs, may be set at a xed distance apart, and any other suitable tripping device of like function may be arranged .in the path of the plate, sheet, bar, or slab, and, being connected with the valvestem, the latter may thereby be automatically moved orthrown at the desired moment and with the desiredv length of throw; and such modifications I include in my invention.

What'I claim as my invention, and desire to secure by Letters Patent, is-f 1. In combination with a pair of rolls, arscraping device adjacent thereto, a steam-cylinder and pistou, and suitable mechanism 'connecting the upper one o t' said rolls with a valve of the steam-cylinder, and a piston-rod connecting the piston ofthe steam-cylinder with .such scraping device, substantially as described.

2. The steam-pipe, communicating at one end with the interior. of the steamcylinder, and terminating at the other end above the path of the plate to be rolled, and between the Scrapers andthe rolls, substantiallyr as andfor the purpose described.

Y In testimony -whereof I, the said CHRISTOPHER ZUG, have hereunto set my hand.

Witnesses: y CHRISTOPHER ZUG.

A. S. NICHOLSON, G. H; CHRISTY.' 

